CVE-2020-28063: A file upload issue exists in all versions of ArticleCMS which allows malicious users to getshell.

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2020-28063 is a critical-severity flaw (CVSS 9.8) affecting articlecms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A file upload issue exists in all versions of ArticleCMS which allows malicious users to getshell.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-434
Published	2021-05-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: articlecms project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-05-13 15:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

articlecms project articlecms MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy articlecms || rpm -q articlecms || articlecms --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-28063?

articlecms: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-28063 being exploited?

CVE-2020-28063 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-28063 affect?

CVE-2020-28063 affects articlecms. Severity is critical (CVSS 9.8). A file upload issue exists in all versions of ArticleCMS which allows malicious users to getshell.

How urgent is CVE-2020-28063?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-20092 CRITICAL 9.8 DOWNGRADE File Upload vulnerability exists in ArticleCMS 1.0 via the image upload feature at /admin by changing the Cont
CVE-2018-19469 MEDIUM 6.1 UPGRADE ArticleCMS through 2017-02-19 has XSS via the /update_personal_infomation realname or email parameter.
CVE-2018-12339 MEDIUM 5.4 UPGRADE ArticleCMS through 2017-02-19 has XSS via an "add an article" action.

References

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